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Do you guys Salome shillers really believe that her numbers will stay with her forever?
Remember that JP is an oversaturated market, any kind of abnormal numbers are the result of overlapping fanbase, unless they're able to attract non vtuber watchers, which is very unlikely. Most of Japanese otakus already knew what is vtuber and they've decided whether to watch them or not. In the end those overlapping fans will be coming back to their oshi once the hype is over.
It's different with Kobo or Vox, their new audiences are entirely new from untapped markets, Kobo and Vox are the first vtuber they've ever watched, so they tends to stay with them.